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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Upstart logo
Upstart
Easy
Data Scientist

Implement factorial and count trailing zeros

Answer the following coding questions in Python. 1) Implement factorial Implement a function factorial(n) that returns \(n!\) for a non-negative integ...

Coding & AlgorithmsMath & Number Theory
10
0
165 people solved
Dec 9, 2025
Google logo
Google
Medium
Data ScientistSenior+

Can bootstrap help reduce variance

An interviewer asks: “Can bootstrap help reduce variance?” Answer this question precisely. Distinguish between: 1) Using the bootstrap to estimate var...

Statistics & MathSampling & Estimation
22
0
253 people solved
Nov 24, 2025
Mistral AI logo
Mistral AI
Medium
Machine Learning Engineer Locked

Optimize Nearest-Center Assignment Without Materializing NxKxD Distances

This Mistral AI machine learning question tests vectorized reasoning for nearest-center assignment without materializing an expensive intermediate ten...

Machine LearningML CodingMemory Management
6
0
103 people solved
Jul 2, 2026
Fetch Rewards logo
Fetch Rewards
Medium
Data Scientist

Write SQL to verify quarterly sales decline

You are given a single dataset for a beverage company and must decide whether Q2 2024 truly declined. Write one standard SQL query that produces a com...

Data Manipulation (SQL/Python)
11
0
70 people solved
Oct 13, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer

Design search autocomplete ML system

Design an ML-powered search autocomplete system that suggests query completions as the user types (e.g., after typing a prefix like "ipho" suggest "ip...

ML System DesignSearch & Feed SystemsRanking Models
52
0
365 people solved
Feb 18, 2026
Google logo
Google
Hard
Data Scientist

Estimate Population Mean and Conversion Rate Accurately

Estimate Population Mean and Conversion Rate Accurately You are asked a series of statistical inference questions covering hypothesis testing, confide...

Statistics & MathHypothesis TestingSampling & Estimation
82
0
323 people solved
Jul 12, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a minimal ChatGPT with presets

System Design: Minimal ChatGPT-like Service With Reusable Presets Context Design a multi-tenant conversational AI service that supports reusable prese...

System DesignSystem Design FundamentalsAPI Design
25
0
205 people solved
Sep 6, 2025
Earnin logo
Earnin
Medium
Data AnalystSenior+

Resolve a Cross-Functional Data Disagreement

The source reported repeated questions about cross-functional collaboration in a senior-level hiring-manager screen, but not their exact wording. Use ...

Behavioral & Leadership
2
0
34 people solved
Apr 20, 2026
Otter.Ai logo
Otter.Ai
Medium
Software Engineer

Fixed-Width Text Display

Fixed-Width Text Display You are building a text display that renders a sequence of words inside a viewport of a fixed character width maxWidth. The d...

Coding & Algorithms
5
0
52 people solved
Mar 24, 2026
Intuit logo
Intuit
Medium
Software Engineer

Sum palindrome-change costs over all substrings

This is a three-part coding screen. Each part is independent — a string-algorithms problem, a SQL aggregation problem, and a shell-parsing problem — a...

Coding & AlgorithmsArrays & StringsSQL
28
0
329 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Hard
Software Engineer

Optimize a compute kernel with a simulator

Performance Optimization Plan for a Compute Kernel Context You are given: - A compute kernel (single critical function or set of loops) to optimize. -...

System Design
22
0
294 people solved
Sep 6, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Find Maximum Rectangle in Bar Chart

Given an array heights of n non-negative integers, where each value represents the height of a vertical bar in a bar chart and every bar has width 1, ...

Coding & Algorithms
3
0
45 people solved
Feb 20, 2026
Meta logo
Meta
Medium
Machine Learning EngineerIntern AI Locked

Derive Linear Regression Solution

This question evaluates understanding of one-dimensional linear regression estimation, the statistical derivation of the mean squared error objective ...

Machine Learning
13
0
97 people solved
Feb 8, 2026
Amazon logo
Amazon
Easy
Software Engineer

Compute minimal operations and optimal server pairing

You are given two independent coding problems. Problem 1: Minimum range-increments to make an array nondecreasing Given an integer array power of leng...

Coding & AlgorithmsGreedySorting
24
0
180 people solved
Dec 17, 2025
Stripe logo
Stripe
Medium
Data Engineer

Compute shipping cost with tiered pricing

You are building a shipping-cost calculator. Each order contains line items, and shipping rules vary by destination country and product. Assume: - Ord...

Coding & Algorithms
12
0
138 people solved
Feb 16, 2025
Google logo
Google
Medium
Data Scientist

Add a conditional column in Python

Using pandas, add a derived column to a table based on multiple conditions with strict precedence and missing-value handling. Given the sample DataFra...

Data Manipulation (SQL/Python)
3
0
53 people solved
Oct 13, 2025
Google logo
Google
Easy
Software Engineer

Solve three coding problems

The interview note described the following coding questions: 1. Find the N-th license plate in lexicographic order - A license plate has exactly 6 ...

Coding & AlgorithmsBacktracking & RecursionIntervals & Scheduling
20
0
186 people solved
Jun 15, 2025
xAI logo
xAI
Medium
Software Engineer

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache You are building the enforcement layer of a rate limiter. Every user has a token bucket s...

Coding & Algorithms
7
1
63 people solved
Sep 23, 2025
Oracle logo
Oracle
Medium
Software Engineer Locked

Design an Enterprise Remote Browser Isolation System

Design a system that runs browsing sessions on isolated virtual nodes and streams the result to enterprise clients. Connect requirements and APIs to d...

System Design
2
0
26 people solved
Jul 26, 2026
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Trace Java Static and Instance Field Initialization

Consider a Java class with static fields a and c, an instance field b, and this initialization: c = 2; the constructor executes a++, b++, and c++. Mak...

Software Engineering Fundamentals
2
0
27 people solved
Jul 27, 2026
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